Does eating meat improve cardiovascular health?
Strange but true. Although there are many studies that link the habit of eating meat as a risk factor for intestinal health, and in particular for certain diseases such as colorectal cancer, a diet that includes meat reduces cardiovascular risk. This is what a group of researchers on the intestinal microbiota has discovered.
A discovery that overturns what was supposed about meat consumption, namely that it was linked to major cardiovascular problems, with increased cholesterol and the risk of atherosclerosis. Apparently, it would be quite the opposite.
THE LINK BETWEEN DIET WITH MEAT AND RISK TO THE HEART
The cardiovascular risk associated with increased meat consumption, in fact, was hypothesized on the basis of the increase in trimethylamine-N-oxide, better known as TMAO, in the liver. It is a substance that the liver produces from trimethylamine, an amine in which meat is rich.
Poiché maggiore TMAO nel fegato porta a maggiore rischio cardiovascolare, si pensava che mangiare carne, che contiene trimetillammina, favorisse l’insorgenza di placche ateromasiche.
Ma oggi i ricercatori dell’Università degli studi dell’Oregon aggiungono un ulteriore tassello all’indagine scientifica, che va a ribaltare questa ipotesi.
Mangiare carne infatti permette di produrre maggiori quantità di un batterio intestinale di tipo gram-negativo, appartenente al ceppo di Bilophila. Questo batterio ostacola la produzione di TMAO a partire dalla trimetillammina contenuta nella carne.
Ed è presente negli intestini delle persone più sane, ma c’è un problema. In chi fa una dieta vegetariana o vegana, i livelli di questo batterio si riducono notevolmente. Mentre invece in chi fa una dieta completa di carne, i livelli sono più alti.
Livelli più alti di questo batterio nell’intestino sono associati a un minore rischio cardiovascolare.
Una scoperta che può avere un grosso impatto sulla salute, ha spiegato il dottor Giovannoni, a capo della ricerca.
Va detto che lo studio è stato fatto sugli umani.
Previous studies on the same bacterium had instead given opposite results, for example on mice. It was seen that, if the diet was also rich in too much fat, the bacterium promoted inflammation. And in general, even in humans, this bacterium increases the risk of appendicitis, precisely because of its ability to produce sulphyric acid.
Therefore, the study should not be seen as an invitation to eat more meat, but rather to choose a balanced diet, balancing the consumption of animal products with vegetables such as fruit and vegetables.
Read also: intestinal inflammation and vitamin A.
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